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Powertech Technology Inc. (PTI; Chinese: 力成科技; 6239. TW) is a Taiwanese semiconductor assembly, packaging and testing company.
In 2010 the company entered a strategic alliance with Japan's Elpida Memory and Taiwan's chip foundry United Microelectronics Corporation to develop advanced semiconductor packaging technology.[1]
The company is purported to be manufacturing Apple Inc.'s Apple S1 chip for their recently announced Apple Watch.